CN222101822U

CN222101822U - Self-locking hinge mechanism and door box equipment

Info

Publication number: CN222101822U
Application number: CN202420138601.8U
Authority: CN
Inventors: 王栋
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2024-01-19
Filing date: 2024-01-19
Publication date: 2024-12-03
Anticipated expiration: 2034-01-19

Abstract

The utility model relates to a self-locking hinge mechanism and a door box device, which can solve the problems of difficult assembly and disassembly of existing hinge components and loose cover. The self-locking hinge mechanism includes: a hinge base; a hinge bracket, including a connecting arm rotatably connected to the hinge base and a pair of bosses convexly arranged on opposite sides of the connecting arm; and a self-locking structure, including a pair of claws with claws matching the bosses and a pair of elastic members, the two claws are symmetrically arranged at intervals to form a plug-in and pull-out channel for the connecting arm, and each elastic member is eccentrically connected to the corresponding claw to apply a variable torque to the claw; when the connecting arm is inserted into the plug-in and pull-out channel, the boss enters the claw mouth to push the claw to flip, so that the claw applies a force in the same direction of insertion to the boss under the action of the elastic member to lock the hinge bracket; when the connecting arm is pulled out of the plug-in and pull-out channel, the boss pulls the claw to reset, so that the claw mouth is biased toward the pull-out direction under the action of the elastic member.

Description

Self-locking hinge mechanism and door box equipment

Technical Field

The utility model relates to the technical field of household appliances, in particular to a self-locking hinge mechanism and door box equipment.

Background

Door chest devices, such as sink dishwashers, are relatively popular household appliances, and are typically movably connected by a hinge assembly between the chest and the door. However, the hinge bracket in the existing hinge assembly is usually mounted to the door body by means of screw fixation, which not only results in that the screw has to be exposed at the side of the door body, seriously affecting the closing effect and the overall aesthetic appearance of the door body, but also requires a special tool such as a screwdriver to be used for disassembly and assembly, which brings inconvenience to maintenance or replacement of the door body or the hinge.

Disclosure of utility model

Based on the above, it is necessary to provide a self-locking hinge mechanism and a door box device, which solve the problems of the prior hinge assembly such as high assembling and disassembling difficulty and poor covering.

In one embodiment of the present utility model, the present utility model provides a self-locking hinge mechanism comprising:

a hinge base for mounting to the case;

a hinge bracket including a connecting arm rotatably connected with the hinge base and a pair of bosses protruding from opposite sides of the connecting arm, and

The self-locking structure comprises a pair of buckling claws and a pair of elastic pieces, wherein the buckling claws and the elastic pieces are used for being rotatably arranged on the door body and provided with claw openings matched with the bosses, the two buckling claws are symmetrically arranged at intervals to form an inserting and pulling channel for inserting and pulling the connecting arms, each elastic piece is eccentrically connected with the corresponding buckling claw to apply a variable torque to the buckling claw, when the connecting arms are inserted into the inserting and pulling channel, the bosses enter the claw openings to push the buckling claws to turn over, so that the buckling claws apply a force with the same inserting direction as that of the hinge bracket to lock the hinge bracket under the action of the elastic pieces, and when the connecting arms are pulled out from the inserting and pulling channels, the buckling claws are pulled to reset by the bosses, so that the claw openings of the buckling claws are biased to the pulling-out direction of the hinge bracket under the action of the elastic pieces.

According to one embodiment of the application, the self-locking structure has a designed dead point position, and the claw openings of the two buckling claws are arranged opposite to each other when the self-locking structure is in the designed dead point position.

According to one embodiment of the application, the elastic piece is a torsion spring, one end of the torsion spring is in limit connection with the buckling claw, and the other end of the torsion spring is in limit connection with the door body.

According to one embodiment of the present application, the torsion spring includes a first pivot lever for rotatably coupling to the door body, a second pivot lever rotatably coupling to the latch claw, and a torsion spring body spirally extending from the first pivot lever to the second pivot lever.

According to one embodiment of the application, the first pivot handle and the second pivot handle are both parallel to the rotational axis of the latch claw, and the second pivot handle is located on a line between the rotational axes of the first pivot handle and the latch claw when the self-locking structure is in a design dead point position.

According to one embodiment of the application, the connecting arm of the hinge bracket comprises a hinge tail part rotationally connected with the hinge base and a plug-in head part extending from the hinge tail part along the insertion direction of the hinge bracket, the boss is positioned on the connecting arm at a position adjacent to the plug-in head part, the self-locking structure further comprises a plug-in cavity positioned in the plug-in channel, and when the boss pushes the buckling claw to overturn, the plug-in head part of the connecting arm is plugged in the plug-in cavity.

According to one embodiment of the application, the hinge base comprises a mounting base frame and a sliding shaft arranged on the mounting base frame, the hinged tail part of the connecting arm is connected with the sliding shaft in a sliding mode, and the self-locking hinge mechanism further comprises a pivoting connecting rod, one end of the pivoting connecting rod is rotatably connected with the mounting base frame, and the other end of the pivoting connecting rod is rotatably connected with the connecting arm.

According to one embodiment of the application, the self-locking hinge mechanism further comprises a damper, one end of the damper is in limit connection with the connecting arm, and the other end of the damper is in limit connection with the sliding shaft.

According to one embodiment of the application, the connecting arm is provided with a sliding groove which is arranged at the tail part of the hinge and matched with the sliding shaft.

According to another aspect of the present application, an embodiment of the present application further provides a door box apparatus, including:

a case;

Door body, and

The self-locking hinge mechanism of any one of the above, wherein the self-locking hinge mechanism is disposed between the case and the door.

In summary, the hinge bracket and the door body in the self-locking hinge mechanism can be forcibly inserted and pulled out in the disassembling process without any disassembling tool, so that the self-locking structure in the self-locking hinge mechanism can be arranged in the door body, and only an inserting and pulling port is reserved on the door body corresponding to the side surface of the box body, thereby not only improving the tight closing effect, but also improving the overall attractive appearance.

In addition, after the connecting arm of the hinge bracket is pulled out of the inserting and pulling channel to enable the boss to be separated from the buckling claw, the claw opening of the buckling claw can always deviate in the pulling-out direction of the hinge bracket under the action of the elastic piece, so that when the connecting arm of the hinge bracket is reinserted into the inserting and pulling channel again, the boss can enter the claw opening again to push the buckling claw to overturn, and further the torque direction of the elastic piece applied to the buckling claw is changed, and locking of the hinge bracket is achieved.

Drawings

Fig. 1 is a schematic perspective view of a door box apparatus according to an embodiment of the present application;

fig. 2 shows a schematic view of a partial explosion of a door box apparatus according to the above-described embodiment of the present application;

fig. 3 is a schematic view showing a state in which the self-locking hinge mechanism in the door box apparatus according to the above embodiment of the present application is in an unlocked state;

FIG. 4 shows an enlarged schematic view of a portion A of the door box apparatus of FIG. 3;

Fig. 5 shows a state diagram of the self-locking hinge mechanism in the door box apparatus according to the above-described embodiment of the present application in a locked state;

FIG. 6 shows an enlarged schematic view of a portion B of the door box apparatus of FIG. 5;

FIG. 7 is a schematic view showing the self-locking mechanism of the self-locking hinge mechanism of FIG. 5 in a design dead-center position;

FIG. 8 is a schematic view of the self-locking mechanism of FIG. 5 prior to crossing a design dead center position;

fig. 9 is a perspective view showing a self-locking structure in the self-locking hinge mechanism according to the above embodiment of the present application;

FIG. 10 is a schematic perspective view of a self-locking hinge mechanism according to the above embodiment of the present application, with the self-locking structure removed;

FIG. 11 shows an exploded view of the self-locking hinge mechanism of FIG. 10;

Fig. 12 shows a schematic cross-sectional view of the self-locking hinge mechanism of fig. 10.

The main element symbol description comprises 1, a self-locking hinge mechanism, 10, a hinge base, 11, a mounting base frame, 111, a mounting base plate, 112, a mounting bracket, 12, a sliding shaft, 20, a hinge bracket, 200, a mounting cavity, 21, a connecting arm, 210, a sliding chute, 211, a hinged tail, 212, a plug head, 22, a boss, 30, a self-locking structure, 300, a plug channel, 31, a buckling claw, 310, a claw opening, 32, an elastic piece, 320, a torsion spring, 321, a first pivot handle, 322, a second pivot handle, 323, a torsion spring body, 33, a plug cavity, 40, a pivot connecting rod, 41, a first pivot, 42, a second pivot handle, 43, a rocking handle, 50, a damper, 500, a plug groove, 2, a box body, 3 and a door body.

The foregoing general description of the utility model will be described in further detail with reference to the drawings and detailed description.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Considering that the hinge bracket in the existing hinge assembly is generally mounted to the door body in a screw fixing manner, not only the covering effect and the overall aesthetic appearance of the door body are affected, but also inconvenience is brought to the maintenance or replacement of the door body or the hinge. The application provides a self-locking hinge mechanism and door box equipment, which can solve the problems of high disassembly and assembly difficulty and poor closure of the existing hinge assembly.

Specifically, referring to fig. 1 to 12, one embodiment of the present application provides a door box apparatus that may include a box body 2 having an opening, a door body 3 for covering the opening of the box body 2, and a self-locking hinge mechanism 1 provided between the box body 2 and the door body 3 to detachably mount the door body 3 to the box body 2 through the self-locking hinge mechanism 1. It is understood that the door box apparatus of the present application may be implemented, but not limited to, a sink type dishwasher or refrigerator, etc., and further, may be implemented, but not limited to, a functional main body capable of performing functions such as dishwashing or refrigerating, etc., and the present application is not repeated herein.

More specifically, as shown in fig. 2 to 12, the self-locking hinge mechanism 1 may include a hinge base 10 for mounting to the case 2, a hinge bracket 20, and a self-locking structure 30 for mounting to the door 3. The hinge bracket 20 may include a connection arm 21 rotatably connected to the hinge base 10 and a pair of bosses 22 protruding from opposite sides of the connection arm 21. The self-locking structure 30 may include a pair of locking claws 31 and a pair of elastic members 32 rotatably disposed on the door body 3 and having claw openings 310 matching the boss 22, the two locking claws 31 are symmetrically spaced to form a plugging channel 300 for plugging the connecting arm 21, and each elastic member 32 is eccentrically connected to the corresponding locking claw 31 to apply a torque with a variable direction to the locking claw 31. It is understood that the eccentric connection referred to in the present application means that the connection position between the elastic member 32 and the locking claw 31 is located at a portion of the locking claw 31 other than the rotation center so as to ensure that the elastic member 32 can apply torque to the locking claw 31.

Specifically, as shown in fig. 5 and 6, when the connection arm 21 of the hinge bracket 20 is inserted into the insertion/extraction channel 300, the boss 22 of the hinge bracket 20 enters the jaw opening 310 to push the latch 31 to turn over, so as to change the torque direction applied to the latch 31 by the elastic member 32, so that the latch 31 applies the same force to the boss 22 as the insertion direction of the hinge bracket 20 under the action of the elastic member 32 to lock the hinge bracket 20, and as shown in fig. 3, 4 and 8, when the connection arm 21 of the hinge bracket 20 is extracted from the insertion/extraction channel 300, the boss 22 of the hinge bracket 20 pulls the latch 31 to reset, so as to change the torque direction applied to the latch 31 by the elastic member 32, so that the latch 31 applies the same force to the boss 22 as the extraction direction of the hinge bracket 20 under the action of the elastic member 32 to release the hinge bracket 20. Thus, as shown in fig. 4, after the boss 22 of the hinge bracket 20 is separated from the locking claw 31, the claw opening 310 of the locking claw 31 can be always biased towards the pulling-out direction of the hinge bracket 20 under the action of the elastic member 32, so that when the hinge bracket 20 is inserted next time, the boss 22 can enter the claw opening 310 of the locking claw 31 again to push the locking claw 31 to turn over, and thus the hinge bracket 20 is locked.

In other words, the self-locking structure 30 of the self-locking hinge mechanism 1 can be switched between a locking state and an unlocking state under the action of the elastic member 32 when the connecting arm 21 of the hinge bracket 20 is inserted into the insertion channel 300 under the action of a large external force as shown in fig. 6, the self-locking structure 30 is switched from the unlocking state to the locking state, at the moment, the direction of torque applied by the elastic member 32 to the latch claw 31 is changed to adapt to the insertion direction of the hinge bracket 20, so that the direction of the acting force applied by the latch claw 31 to the boss 22 under the action of the elastic member 32 is the same as the insertion direction of the hinge bracket 20, so that the boss 22 of the hinge bracket 20 is grasped by the latch claw 31, the connecting arm 21 of the hinge bracket 20 is prevented from being unintentionally or accidentally pulled out from the insertion channel 300, thereby realizing that the hinge bracket 20 is mounted to the door body 3 without a special tool, when the connecting arm 21 of the hinge bracket 20 is pulled out from the insertion channel 300 under the action of a large external force as shown in fig. 4 and fig. 8, the direction of the latch claw 30 is changed to the direction of the hinge bracket 30 is changed to the direction of the insertion channel 20, the direction of the hinge bracket 20 is allowed to be removed from the hinge bracket 20, the direction is changed to the direction of the hinge bracket 20 is not required to be the same as the elastic member 32, and the direction of the hinge bracket 20 is released from the direction is allowed to be the hinge bracket 20.

It should be noted that, as shown in fig. 4, after the connecting arm 21 of the hinge bracket 20 is pulled out from the insertion channel 300 to disengage the boss 22 from the locking claw 31, the claw opening 310 of the locking claw 31 can be always biased towards the pulling direction of the hinge bracket 20 under the action of the elastic member 32, so that when the connecting arm 21 of the hinge bracket 20 is reinserted into the insertion channel 300, the boss 22 can enter the claw opening 310 again to push the locking claw 31 to turn over, thereby changing the torque direction applied by the elastic member 32 to the locking claw 31, so as to lock the hinge bracket 20. In addition, the hinge bracket 20 and the door body 3 only need to be forcibly inserted and pulled out in the process of disassembly and assembly, and any disassembly tool is not needed, so that the self-locking structure 30 in the self-locking hinge mechanism 1 can be arranged in the door body 3, and only the insertion and pulling port is reserved on the side surface of the door body 3 corresponding to the box body 2, so that the tight covering effect can be improved, and the overall attractiveness can be improved.

It will be appreciated that during the insertion of the connecting arm 21 of the hinge bracket 20 into the insertion channel 300 or the extraction of the connecting arm from the insertion channel 300, the torque applied by the elastic member 32 to the latch 31 will have a moment equal to zero so as to change the torque direction (i.e. the torque direction of the last moment is exactly opposite to the torque direction of the next moment), at which time, as shown in fig. 7, the moment arm of the torque applied by the elastic member 32 to the latch 31 is equal to zero, the present position of the latch 31 is defined as the designed dead point position of the self-locking structure 30, i.e. as shown in fig. 8, the direction of the force applied by the latch 31 to the latch 22 by the elastic member 32 is opposite to the push or pull direction of the latch 22 before the latch 22 passes the designed dead point position, and, as shown in fig. 6, the direction of the force applied by the latch 31 to the latch 22 by the elastic member 32 is exactly the same as the push or pull direction of the latch 22.

Alternatively, as shown in fig. 7, when the self-locking structure 30 is at the designed dead point position, the claw openings 310 of the two locking claws 31 are disposed opposite to each other so that the claw openings 310 of the locking claws 31 are biased in the opposite direction to the insertion direction before passing the designed dead point position, and after passing the designed dead point position, the claw openings 310 of the locking claws 31 are biased in the same direction as the insertion direction to better lock or release the boss 22. It will be appreciated that the directions of insertion and extraction referred to herein include the direction of insertion and the direction of extraction, i.e., during insertion, the jaw 310 of the clasp jaw 31 is biased in the opposite direction to the direction of insertion before passing over the designed dead point position as shown in fig. 4 and 8 to better receive the boss 22 and the jaw 310 of the clasp jaw 31 is biased in the same direction as the direction of insertion after passing over the designed dead point position to better lock the boss 22, and during extraction, the jaw 310 of the clasp jaw 31 is biased in the opposite direction to the direction of extraction before passing over the designed dead point position as shown in fig. 6 to reliably lock the boss 22 and the jaw 310 of the clasp jaw 31 is biased in the same direction as the direction of extraction after passing over the designed dead point position to better release the boss 22.

Illustratively, as shown in fig. 4 and 9, the elastic member 32 may be implemented as, but is not limited to, a torsion spring 320, one end of the torsion spring 320 being limitedly connected to the latch 31, the other end of the torsion spring 320 being for limitedly connecting to the door body 3 so as to apply a variable-direction torque to the latch 31. Of course, in other examples of the application, the elastic member 32 may be implemented as a tension spring or a compression spring, as long as the torsion with variable direction can be applied to the locking claw 31, which will not be described in detail.

Alternatively, as shown in fig. 6 to 9, the torsion spring 320 includes a first pivot 321 for rotatably coupling to the door body 3, a second pivot 322 rotatably coupling to the latch 31, and a torsion spring body 323 spirally extending from the first pivot 321 to the second pivot 322. Thus, when the hinge bracket 20 is inserted into the insertion/extraction passage 300 or extracted from the insertion/extraction passage 300, the locking claw 31 is turned over under the driving of the boss 22, so that the torsion spring body 323 of the torsion spring 320 is twisted and reset to accumulate and release elastic potential energy, thereby realizing the change of the direction of the torque applied to the locking claw 31.

Preferably, as shown in fig. 7, the first pivot 321 and the second pivot 322 are parallel to the rotation axis of the latch 31, and the second pivot 322 is located on the line between the rotation axes of the first pivot 321 and the latch 31 when the self-locking structure 30 is in the design dead center position. Thus, as shown in fig. 8, the second pivot handle 322 is located on one side of the line between the first pivot handle 321 and the rotational axis of the locking pawl 31 before passing over the design dead point position, and as shown in fig. 6, the second pivot handle 322 is located on the other side of the line between the first pivot handle 321 and the rotational axis of the locking pawl 31 after passing over the design dead point position, ensuring that the direction of torque applied by the torsion spring 320 to the locking pawl 31 changes before and after passing over the design dead point position.

Alternatively, as shown in fig. 4 to 10, the connection arm 21 of the hinge bracket 20 may include a hinge tail 211 rotatably connected to the hinge base 10 and a socket 212 extending from the hinge tail 211 along the insertion direction of the hinge bracket 20, and the boss 22 is located on the connection arm 21 adjacent to the socket 212, while the self-locking structure 30 further includes a socket 33 located in the insertion channel 300, and when the boss 22 pushes the latch 31 to flip to switch to the locking state, the socket 212 of the connection arm 21 is inserted into the socket 33 to limit the connection arm 21 in the non-insertion direction, thereby helping to promote the locking effect.

According to the above embodiment of the present application, as shown in fig. 6 to 12, the hinge base 10 includes a mounting base frame 11 and a sliding shaft 12 provided at the mounting base frame 11, the hinge tail 211 of the connection arm 21 is slidably connected to the sliding shaft 12, and the self-locking hinge mechanism 1 may further include a pivoting link 40, one end of the pivoting link 40 is rotatably connected to the mounting base frame 11, and the other end of the pivoting link 40 is rotatably connected to the connection arm 21.

It should be noted that, since the two ends of the pivot connecting rod 40 in the self-locking hinge mechanism 1 are respectively rotatably connected to the mounting base frame 11 and the connecting arm 21, and the connecting arm 21 of the hinge bracket 20 is slidably connected to the sliding shaft 12, in the first half of the closing of the door body 3 and the box body 2, the door body 3 rotates around the sliding shaft 12, and in the second half of the closing of the door body 3 and the box body 2, the door body 3 rotates around the end pivoted to the mounting base frame 11 on the pivot connecting rod 40, so that the door body 3 can realize a variable center rotation in the closing process, thereby avoiding structural interference between the door body 3 and the box body 2 in the door opening and closing process, ensuring a small enough gap between the door body 3 and the box body 2 in the door closing state, ensuring the overall aesthetic appearance of the device, and improving the user experience. In addition, the door body 3 can realize variable center rotation in the closing process, so that the whole hinge can be made thin, and the space requirement of door box equipment such as a sink type dish washer and the like when the door is closed can be met.

Alternatively, as shown in fig. 11 and 12, the self-locking hinge mechanism 1 may further include a damper 50, one end of the damper 50 is limitedly connected to the connection arm 21, and the other end of the damper 50 is limitedly connected to the slide shaft 12. Thus, as shown in fig. 8 and 9, when the connection arm 21 of the hinge bracket 20 is rotated with respect to the mounting base frame 11 to bring the plug-in head 212 of the connection arm 21 toward or away from the mounting base frame 11, the slide shaft 12 slides with respect to the hinge tail 211 of the connection arm 21 to come toward or away from the plug-in head 212, so that the damper 50 is compressed or extended. In other words, when the door 3 and the case 2 are mutually covered, the connecting arm 21 of the hinge bracket 20 rotates relative to the mounting base frame 11 under the driving of the door 3 to enable the plug head 212 to approach the mounting base frame 11, at this time, the sliding shaft 12 slides relative to the hinge tail 211 to approach the plug head 212, so that the damper 50 is compressed to generate damping, and the door 3 is prevented from being covered too fast to hurt a user, and when the door 3 and the case 2 are mutually opened, the hinge bracket 20 rotates relative to the mounting base frame 11 under the driving of the door 3 to enable the plug head 212 to be far away from the mounting base frame 11, at this time, the sliding shaft 12 slides relative to the hinge tail 211 to be far away from the plug head 212, so that the damper 50 is stretched, and is compressed to generate damping when the door 3 is covered next time.

It should be noted that, the self-locking hinge mechanism 1 of the present application can organically integrate the variable center hinge structure with the damper, and only the case 2 and the door 3 need to be fixedly connected to the hinge base 10 and the hinge bracket 20 of the self-locking hinge mechanism 1 respectively during installation, which not only effectively reduces the installation space, but also greatly reduces the installation difficulty. It will be appreciated that, in other examples of the present application, the damper 50 may be disposed at other positions, such as between the pivot link 40 and the mounting base frame 11, as long as the damper is capable of generating damping when the door is closed, and the present application will not be repeated.

Alternatively, as shown in fig. 12, one end of the damper 50 is pivotally connected to the connecting arm 21 adjacent to the plug portion 212, and the other end of the damper 50 is rotatably connected to the sliding shaft 12. In this way, the sliding shaft 12 will approach the plug head 212 to press the damper 50 during the process of closing the door 3 to the box 2, so that the damper 50 is compressed to generate damping, and the user is prevented from being injured by the too fast closing speed, and the sliding shaft 12 will be far away from the plug head 212 during the process of opening the door 3 relative to the box 2, so as to release the damper 50, so that the damper 50 is stretched, so that the damper is compressed to generate damping again next time the door 3 is closed.

Alternatively, the rotation angle of the hinge bracket 20 with respect to the mounting base frame 11 has a critical angle section, and the length change rate of the damper 50 is less than the change threshold when the hinge bracket 20 rotates by a unit angle with respect to the mounting base frame 11 in the critical angle section. It is understood that the length change rate may refer to a ratio percentage between a difference between a length of the damper 50 before the rotation of the hinge bracket 20 and a length of the damper 50 after the rotation of the hinge bracket 20 and a length of the damper 50 before the rotation of the hinge bracket 20. In addition, the damper 50 of the present application may be, but not limited to, implemented as a device capable of generating damping with a length change, such as a spring or a hydraulic rod, and the present application will not be repeated.

When the hinge bracket 20 rotates within an angle range smaller than the left end point of the critical angle range relative to the mounting base frame 11, the sliding shaft 12 slides relative to the hinge tail 211 to approach or separate from the plug head 212, so that the damper 50 is compressed to generate damping or stretching, and when the hinge bracket 20 rotates within the critical angle range relative to the mounting base frame 11, the hinge bracket 20 rotates around the sliding shaft 12, namely, the sliding shaft 12 is neither close to nor far from the plug head 212, so that the length change rate of the damper 50 approaches zero, that is, the sliding shaft 12 does not press the damper 50 or only applies small pressing force to the damper 50, so that the damper 50 does not generate or generates small damping, so that a user cannot feel damping, and the closing experience of the user is improved, and when the hinge bracket 20 rotates outside the critical angle range, the damper 50 is pressed by the sliding shaft 12, so that the rotation angle of the hinge bracket 20 is stably kept within the critical angle range, and the door body 3 connected with the hinge bracket 20 is prevented from being rapidly clamped under the action of a heavy weight or a bump, so that a user is prevented from being suddenly clamped.

Preferably, the variation threshold is equal to zero. Of course, in other examples of the application, the change threshold may also be implemented as a non-zero value near zero, so long as a small rate of change of the length of the damper 50 is ensured, resulting in a small damping force, without affecting the user experience.

Optionally, the left end point of the critical angle interval is between 90 ° and 100 °, and the right end point of the critical angle interval is greater than the left end point and less than or equal to 130 °. Preferably, the right end point of the critical angle interval is between 110 ° and 120 °.

As shown in fig. 11 and 12, the connecting arm 21 may have a sliding groove 210 opened at the hinge tail 211 and matched with the sliding shaft 12, the sliding groove 210 having a first end adjacent to the plug-in head 212 and a second end far away from the plug-in head 212, and the sliding shaft 12 is always located at the second end of the sliding groove 210 or moves within a small range near the second end when the hinge bracket 20 rotates relative to the mounting base frame 11 within the critical angle range.

According to the above-described embodiment of the present application, as shown in fig. 10 and 11, the pivotal link 40 may include a first pivot 41 connected to the mounting base frame 11, a second pivot 42 connected to the connection arm 21 of the hinge bracket 20, and a crank 43 extending from the first pivot 41 to the second pivot 42, so that both ends of the pivotal link 40 are rotatably connected to the mounting base frame 11 and the connection arm 21, respectively.

Alternatively, as shown in fig. 10 and 11, the rocking handle 43 extends from the first pivot 41 to the second pivot 42 in a bending manner, so as to avoid the sliding groove 210 on the connecting arm 21 while ensuring that both ends of the pivot link 40 are respectively rotatably connected with the mounting base frame 11 and the connecting arm 21, thereby preventing the rocking handle 43 from interfering with the sliding shaft 12, so that the sliding shaft 12 slides smoothly along the sliding groove 210, and further ensuring that the door 3 is opened and closed smoothly relative to the case 2.

Alternatively, as shown in fig. 10 to 12, the mounting base frame 11 may include a mounting base plate 111 and a mounting bracket 112 extending upward from the mounting base plate 111, the first pivot 41 and the slide shaft 12 are rotatably provided to the mounting bracket 112, respectively, and the slide shaft 12 is located between the first pivot 41 and the mounting base plate 111. Thus, when the door 3 is covered on the case 2, the first pivot 41 is located above the sliding shaft 12 and the second pivot 42, preventing the rocking handle 43 connecting the first pivot 41 and the second pivot 42 from interfering with the mounting base 111, so that the second pivot 42 is closer to the mounting base 111, ensuring that the gap between the door 3 and the case 2 is minimized, and improving the overall aesthetic appearance of the apparatus.

Alternatively, as shown in fig. 10 and 11, the number of the mounting brackets 112 in the mounting base frame 11 is two, and the two mounting brackets 112 are arranged at intervals on the mounting base plate 111, the number of the rocking handles 43 in the pivotal link 40 is also two, at this time, the first pivot 41 is a pair of short axes to rotatably connect the two rocking handles 43 to the two mounting brackets 112 through the two short axes, respectively, so as to avoid the hinge bracket 20, and the second pivot 42 is a long axis to rotatably connect the two rocking handles 43 to the connecting arm 21 through the long axis at the same time. It will be appreciated that in other examples of the application, the second pivot 42 may also be implemented as a pair of stub shafts, whereby two handles 43 are rotatably connected to the connecting arm 21 via the two stub shafts, respectively

Alternatively, as shown in fig. 11 and 12, the hinge bracket 20 may have a mounting cavity 200 extending longitudinally through the connection arm 21, and the damper 50 is mounted within the mounting cavity 200. In this way, the damper 50 accommodated in the installation cavity 200 does not occupy an additional external space, but is also conveniently rotatably connected with the slide shaft 12, greatly improving the integration level of the hinge mechanism, contributing to a reduction in volume and space. It can be appreciated that the hinge bracket 20 of the present application can replace the existing damper housing, so as to greatly reduce the friction between the damper housing and the hinge bracket 20, avoid abrasion, and facilitate the improvement of service life while reducing the cost.

Alternatively, as shown in fig. 11 and 12, the damper 50 may have a laterally extending socket 500, and the slide shaft 12 is movably coupled to the socket 500. In this way, the sliding shaft 12 can not only longitudinally push and pull the damper 50 when longitudinally approaching or moving away from the plug-in portion 212 to longitudinally compress or expand the damper 50 within the mounting cavity 200, but also can rotate and/or laterally move within the plug-in slot 500 of the damper 50 to facilitate flexibility of the mechanism and prevent jamming problems. In addition, the damper 50 is rotatably connected to the connecting arm 21, so that the damper 50 can rotate in the mounting cavity 200, the flexibility of the damper 50 is improved, and the problem of locking the damper 50 and the sliding shaft 12 is avoided.

It should be noted that, in the above embodiment of the present application, the hinge base 10 of the self-locking hinge mechanism 1 may be mounted to the case 2 by using a fastener such as a screw or a rivet, or the hinge base 10 may be directly welded to the case 2, which will not be repeated herein.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. A self-locking hinge mechanism, used to connect a box body and a door body, characterized in that the self-locking hinge mechanism comprises:

a hinge base for mounting on the box;

A hinge bracket, the hinge bracket comprising a connecting arm rotatably connected to the hinge base and a pair of bosses protruding from opposite sides of the connecting arm; and

A self-locking structure for installation on the door body, the self-locking structure includes a pair of claws and a pair of elastic members which are rotatably set on the door body and have claw openings matching the bosses, the two claws are symmetrically spaced to form an insertion and extraction channel for the connecting arm, and each elastic member is eccentrically connected to the corresponding claw to apply a torque with variable direction to the claw; when the connecting arm is inserted into the insertion and extraction channel, the boss enters the claw opening to push the claw to flip, so that the claw applies a force on the boss in the same direction as the insertion direction of the hinge bracket under the action of the elastic member to lock the hinge bracket; when the connecting arm is pulled out of the insertion and extraction channel, the boss pulls the claw to reset, so that the claw opening of the claw is biased toward the extraction direction of the hinge bracket under the action of the elastic member.

2. The self-locking hinge mechanism according to claim 1 is characterized in that the self-locking structure has a designed dead point position, and when the self-locking structure is at the designed dead point position, the claws of the two claws are arranged facing each other.

3. The self-locking hinge mechanism according to claim 2 is characterized in that the elastic member is a torsion spring, one end of the torsion spring is limitedly connected to the clasp, and the other end of the torsion spring is used to be limitedly connected to the door body.

4. The self-locking hinge mechanism according to claim 3 is characterized in that the torsion spring includes a first pivot handle rotatably connected to the door body, a second pivot handle rotatably connected to the pawl, and a torsion spring body spirally extending from the first pivot handle to the second pivot handle.

5. The self-locking hinge mechanism according to claim 4 is characterized in that the first pivot handle and the second pivot handle are both parallel to the rotation axis of the pawl, and when the self-locking structure is in a designed dead point position, the second pivot handle is located on the line between the first pivot handle and the rotation axis of the pawl.

6. The self-locking hinge mechanism according to any one of claims 1 to 5 is characterized in that the connecting arm of the hinge bracket includes a hinge tail portion rotatably connected to the hinge base and a plug-in head portion extending from the hinge tail portion along the insertion direction of the hinge bracket; the boss is located on the connecting arm at a position adjacent to the plug-in head portion; the self-locking structure further includes a plug-in cavity located in the plug-in channel, and when the boss pushes the claw to flip, the plug-in head portion of the connecting arm is plugged into the plug-in cavity.

7. The self-locking hinge mechanism according to claim 6 is characterized in that the hinge base includes a mounting base and a sliding shaft arranged on the mounting base; the hinged tail of the connecting arm is slidably connected to the sliding shaft; the self-locking hinge mechanism further includes a pivot connecting rod, one end of the pivot connecting rod is rotatably connected to the mounting base, and the other end of the pivot connecting rod is rotatably connected to the connecting arm.

8. The self-locking hinge mechanism according to claim 7 is characterized in that the self-locking hinge mechanism further comprises a damper, one end of the damper is limit-connected to the connecting arm, and the other end of the damper is limit-connected to the sliding shaft.

9 . The self-locking hinge mechanism according to claim 8 , wherein the connecting arm has a sliding groove which is opened at the hinge tail and matches the sliding shaft.

10. Door box equipment, characterized by comprising:

Box;

Door body; and

The self-locking hinge mechanism according to any one of claims 1 to 9, wherein the self-locking hinge mechanism is arranged between the box body and the door body.